Electrical Design Guide
‑34‑
● High voltage may be still present in the servo drive after the power supply is
switched off. Do not touch the power supply terminals within 5 minutes after
power‑off.
● Do not switch on/off the power supply frequently. If the power supply is switched
on or off frequently within 1s, E740.0/E136.0/E430.0 may occur (see section
Description of Error Codes in SV670N Series Servo Drive Troubleshooting Guide). In
this case, power on the servo drive again after waiting for the specified ON/OFF
interval. If frequent ON/OFF operation is needed, the time interval between ON
and OFF must be at least 1 min.
The servo drive carries a capacitor in the power supply part, and this capacitor will
be charged with a high current for 0.2s upon power‑on. Turning on/off the power
supply frequently affects the performance of main circuit components inside the
servo drive.
● Do not power on the servo drive if terminal screws or cables are loose. Failure to
comply may lead to a fire.
Observe national or regional regulations when selecting cable dimensions.
Requirements on IEC cable selection:
● EN 60204‑1 and IEC 60364‑5‑52 standards
● Copper conductors with PVC insulation
● Heat resistance: 40°C ambient temperature and 70°C cable surface temperature
(Contact the manufacturer if the ambient temperature exceeds 40°C.)
For details about requirements on UL cable selection, see "
Cable requirements
"
on
page 74
.
Note
If the recommended cable specifications for peripheral devices or optional parts exceed the
applicable cable specifications, contact Inovance.
2.5.2 Routing Recommendations
Servo drive power input cables and motor cables may generate strong
electromagnetic interference. To prevent the electromagnetic interference incurred
by long‑distance parallel routing and coupling between disturbing cables and control
cables, keep a clearance of at least 30 cm between main circuit cables and signal
cables. Main circuit cables include the RST cable, UVW cable, DC bus, and braking
cable. Signal cables include the I/O signal cable, communication cable, and encoder
cable.
Cable ducts must be connected and grounded properly. Aluminum cable ducts can be
used to ensure equipotentiality of the device. The filter, servo drive, and motor must
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